baber/WOPTO huggingface dataset:
Patent GB-2233479-A (GB)
Title: Regulated DC-DC power supply
Inventor: BAKKER GERHARDT
IPC: G05F1/38
Filed: 1990-06-28
Abstract: A supply voltage Vbulk is connected to the primary PRIM of a transformer T3 of a DC-to-DC converter via primary switches Q3-Q4-D8-D9. Primary control PWM turn on Q3 and Q4 with on pulses of constant repetition frequency and width controlled by the difference of Vref1 and the output voltage of low pass filter FLTR so as to keep the output constant. A secondary winding SEC 1 feeds rectifying and smoothing circuit L4-C50 via a magnetic amplifier L3, functioning as a saturable reactor, which is set by secondary control (Fig. 3) at the end of the on time and so blocks the secondary output as it resets at the beginning of the next on time. The secondary control sets the width of the blocking signal RESET as the time from the start of a ramp of slope determined by the supply voltage Vbulk to when the ramp exceeds a threshold level determined by a feed-back error signal ERROR from the output. Transistors Q5 and Q7 are used to prevent spurious resetting of the magnetic amplifier by ringing or diode reverse current. A detailed circuit is described (Figs 4A-4D) which includes an 5CR (D44) which shorts the output of the secondary supply as the result of a sensed malfunction. <IMAGE>
Patent GB-2236790-A (GB)
Title: Electromagnetic shielding panel.
Inventor: CLARKE LESLIE THOMAS
IPC: E06B5/18
Filed: 1990-08-16
Abstract: An electromagnetic shielding panel (1, 2, 3, 4, P5) incorporates at least two electroconductive coatings (10 and 6, 7,8). In two of the panels (1,2) the coatings are carried on separate sheets of float glass (5,9), one of the coatings 10 being an anti-abrasive coating is on the outermost surface of the glass (9) in the panel arrangement, while the other coating (6,7,8) being a relatively soft abrasive-sensitive coating, e.g. silver, is on the innermost of the glass 5 in the panel arrangements. In other panel arrangements (3,4,P5) the two coatings are located on opposing sides of one glass sheet 9 and on two of the panels (3,4) a plain sheet of float glass (11) is employed to protect the soft silver coating (6,7,8). In another panel (P5) a sheet of glass (9) carrying an anti-abrasive coating (10) is employed. The panels are of the double glazed type (Fig. 1, Fig. 3, Fig. 5) and the laminated type (Fig. 2, Fig. 4). This invention utilises the enhanced capacitive coupling (C) between the two coatings (10 and 6,7, 8) to effectively earth the innermost silver coating (6,7,8) by way of the anti-abrasive coating 10 without any direct electrical connection being required to be made to the innermost coating (6,7,8).
Patent GB-2237023-A (GB)
Title: A catalytic composition for photopolymerization
Inventor: TAKAHASHI SHIN
IPC: C08F4/32
Filed: 1990-10-03
Abstract: A catalytic composition for photopolymerization of e.g. vinyl compounds comprises an alpha-diketone and a hydrazone or a silane compound which has a silicon atom carrying a hydrogen.
Patent GB-2248948-A (GB)
Title: Electron 10 pump activator
Inventor: GROVES STEPHEN
IPC: F04D15/02
Filed: 1990-10-19
Abstract: An electronic pump activator for fitting into boat bilges automatically activates an external pump when the water reaches a level, governed by the position of the unit, which is firmly hold by a mounting bracket 6. As water touches the substrate sensor 2 the control/timing circuit 3 which is preferably encapsulated within an epoxy resin 5, and housed in an enclosure 1, activates an external pump 7 for a controlled period of time. At the end of this controlled period the timing circuits 3 shut down the pump 7. If water is still touching the sensor 2 the cycle is repeated. The pump can be activated manually, regardless of water level via one of the connecting wires 4. <IMAGE>
Patent GB-2237501-A (GB)
Title: Guide apparatus for guiding an inner unit
Inventor: TSUKADA YASUO
IPC: A47B88/49
Filed: 1990-10-31
Abstract: A guide apparatus for guiding an inner unit (13) comprises a coil spring (23) for energizing an intermediate rail (18) in its housing direction. If the intermediate rail (18) is always energized by the coil spring (23), it can be prevented from remaining outside a housing (11) even when a drawing operation of the inner unit (13) is stopped and changed. Further, the intermediate rail (18) can be prevented from jumping out of the housing even when the inner unit is suddenly drawn. <IMAGE>
Patent GB-2241282-A (GB)
Title: Door handle assemblies
Inventor: ATHA ALFRED
IPC: E05B13/00
Filed: 1991-02-21
Abstract: A door handle assembly (10) comprises a shaft 16 and handles 12,14, the shaft engaging a door latch mechanism 18,22 so that turning of either handle releases the door latch mechanism and enables the door to be opened. The shaft 16 can be displaced in the direction of its length by one handle 12 or a part thereof to cause the other handle 14 to be immobilised. The shaft when so displaced may be moved to a position in which a bar 70 passing through the shaft engages slots 68 in a retention plate 62 so that the entire shaft and each handle is therefore immobilised. Thus, by pulling on a block 52 fast with shaft 18 on the inside of the door the other handle can be immobilised. A detent 56 serves to retain the shaft 18 in locked and unlocked position. Shaft 18 may move clear of handle 14 when moved to a locked position.   <IMAGE>
Patent GB-2244690-A (GB)
Title: Improvements relating to gift wrapping
Inventor: HEDLUND STIG ANDERS
IPC: B65H18/28
Filed: 1991-04-05
Abstract: Lengths of different decorative paper are rolled together, preferably on a common core, in an axially overlapping manner so that part at least of each decorative side is visible. The lengths may be rolled simultaneously, to interleave, or sequentially, and they may be of uniform width or of different widths. <IMAGE>
Patent GB-2244443-A (GB)
Title: Method and device for compressing granular moulding materials
Inventor: FISCHER KURT
IPC: B22C15/24
Filed: 1991-04-18
Abstract: A method for manufacturing foundry mouldings has a first stage of introducing moulding material by means of a compressed air current into the moulding container, and a second stage of maintaining or renewing the compressed air flow for a specified time, or until reaching a predetermined pressure, once introduction of the moulding materials is completed to effect precompression. A further stage of subsequent compression of the pre-compressed moulding material in the moulding container can be effection by mechanical means or by a further compressed air surge. With the method a particularly homogeneous compressed shaping is achieved, with shortened cycle times due to the fact that the supply container does not have to be removed from the moulding container for the compaction step.
Patent GB-2243686-A (GB)
Title: Temperature responsive actuating elements
Inventor: O'NEILL ROBERT ANDREW
IPC: G01K5/66
Filed: 1991-04-30
Abstract: A thermally-responsive differential expansion device is similar to a bimetallic device but has its plural layers formed of synthetic plastics materials having lower thermal conductivity whereby the device can sustain a greater temperature differential across its thickness (eg. 10  DEG C) than the negligible differential that a high thermal conductivity bimetal can sustain. Such a "biplastics" device can be arranged to be insensitive to the constantly rising temperature as water is heated in a kettle since the device will maintain a generally constant temperature differential, but will respond to the onset of boiling when the temperature differential across the device will disappear. Enhanced effects are obtained by use of fibre reinforced plastics materials with the fibres differently oriented in the different layers, so as to take advantage of the dependency of the coefficient of linear expansion upon fibre orientation. Such "biplastics" devices provide advantages in kettle controls for example since the sensor has only to be mounted on the outside of the kettle wall and need not be exposed to live steam to operate as a boiling control.
Patent GB-2257740-A (GB)
Title: Self-climbing exterior scaffolding system
Inventor: WAH MAN-HO
IPC: E04G3/28
Filed: 1991-07-15
Abstract: The system is one set of double rows of scaffolds with tubular steel and couplers 1, about 3-storey high, supported by brackets 5 which are fastened to the main structure. The whole system can be lifted by winches 13 simultaneously in pace with construction. When the main structure is topped-out, the system can be lowered for exterior finishes until reaching ground. Holes 17 are provided to attach brackets 5 or winch 13 at various levels on the structure. <IMAGE>
Patent GB-2253291-A (GB)
Title: Signalling apparatus
Inventor: BELL KEVIN
IPC: G07C9/00
Filed: 1991-08-09
Abstract: A signalling apparatus comprises an operator unit (10) and a responder unit (11), each of the operator and responder units (10, 11) comprising means to transmit and receive data signals from one to the other, each of the operator (10) and responder units (11) being adapted to verify that any data signal received thereby, is that which is expected by the unit, one of the responder and operator units (11) when data signal exchange between the operator and responder units (10, 11) is completed, actuating an actuating means (25) to enable an operating function to be performed. <IMAGE>
Patent GB-2249798-A (GB)
Title: Reglet assembly with snap-on flashing
Inventor: KIRBY RALPH
IPC: E04D13/14
Filed: 1991-09-19
Abstract: A reglet or flashing assembly includes a bar member 20 with a snap-on resilient flashing 72. It can accommodate longitudinal expansion without leakage at longitudinally-adjacent joints, as well as providing for such a snap-on flashing component that only requires installation forces that are directed toward the wall, thus avoiding adverse effects on sealants, water-proof membranes, or other wall surface panels or structures. In at least one version, the reglet assembly also accommodates irregularities along the surface of the wall, such as high or low points or recesses resulting from masonry mortar joints. Slot 56 accommodates jointing pieces between lengths of the bar 20. Sealant 52 is applied on site, and resilient seal 40 may also be provided. The holes 42 for fasteners 44 may be elongate in the vertical and/or horizontal direction to allow for levelling. <IMAGE>
Patent GB-2263307-A (GB)
Title: Four-stroke engine with a charge pump.
Inventor: MCCANN CHRISTOPHER JOHN
IPC: F02B33/32
Filed: 1992-01-07
Abstract: The diaphragm 21 operated by crankcase pressure variations charges the inlet tract 15. In a multi-cylinder engine separate diaphragm pumps operated by pressure variations in respective crank chambers may supply respective inlet tracts or a common manifold. <IMAGE>
Patent GB-2253205-A (GB)
Title: Cross cutting running webs
Inventor: RILITZ NORBERT
IPC: B26D1/40
Filed: 1992-02-27
Abstract: A cross cutter for a running web 3 which is transported along a desired path 12 has rotary knife holders 1a and 2a carrying knives 11 and 8 which extend transversely of the path. Each holder further carries an elastic lip-shaped deflector 14, 13 which is located behind the respective knife and serves to maintain the web leader 25 in or close to the desired path and counter the tendency for the leader 25 to cling to one or other holder 1a, 2a. The lower deflector is installed immediately behind and the upper deflector is spaced apart from the rear side of the respective knife. A guide 16, 17 aids separation of the web from holder 2a. <IMAGE>
Patent GB-2259827-A (GB)
Title: Deriving motion vectors from field delayed interlaced video signals
Inventor: BURL MICHAEL
IPC: H04N7/01
Filed: 1992-09-03
Abstract: Alternate video fields are shifted vertically (4, 8 Fig 2) so as to align the picture lines of interlaced fields, by moving the lines of one field up by half a picture line and the lines of the next field down by half a picture line. The fields of each resultant pair are compared in phase correlators (6, 10) to produce a set of motion vectors which can be used to motion compensate the video signal. The accuracy may be improved using temporal filters operative on correlation surfaces derived over two or more field intervals. <IMAGE>
Patent GB-2260043-A (GB)
Title: Electronic circuit breaker with protection against sputtering arc faults and ground faults
Inventor: MACKENZIE RAYMOND WARREN
IPC: H02H3/44
Filed: 1992-09-18
Abstract: A circuit breaker comprises a ground fault detector 21, a line-to-neutral fault detector 25, and a solenoid 31. The ground fault circuit and the line-to-neutral fault circuit share a common current sensor 19 in the neutral line 5. The line-to-neutral fault circuit detects both overcurrents and sharply rising currents. The rate of change of current is sensed by the low mu coil 19, bandwidth limited, rectified and compared with a reference value. There is an instantaneous trip and a delayed trip. The device protects against arcing 13, overload and ground faults 15. The ground fault detector may be of the dormant oscillator type. <IMAGE>
Patent GB-2262542-A (GB)
Title: Paper coating
Inventor: GANE PATRICK ARTHUR CHARLES
IPC: D21H19/44
Filed: 1992-11-05
Abstract: There is disclosed a paper coating composition comprising, in aqueous suspension, an adhesive and a treated paper coating pigment prepared by the following process:   (i) suspending a paper coating pigment in water to form a suspension containing at least 5% by weight of the pigment, the pH being adjusted, if necessary, to lie below 7.5; (ii) mixing with the suspension formed in step (i) a water-soluble organic compound having a plurality of primary and/or secondary amine groups and a number average molecular weight not greater than 1000; and (iii) at least partially dewatering the mixed suspension resulting from step (ii) to form a dewatered suspension of a treated paper coating pigment containing not more than about 30% by weight water; characterised in that the water soluble organic compound is added in step (ii) in an amount sufficient to decrease the 5 poise viscosity concentration of an aqueous suspension of the treated pigment relative to that obtained with the untreated pigment. The paper coating composition is particularly suited to the preparation of a coated paper which is to be printed on by a gravure technique.
Patent GB-2262652-A (GB)
Title: Aperture grill
Inventor: SHIOHARA KENJI
IPC: H01J29/07
Filed: 1992-12-03
Abstract: An aperture grill for a colour picture tube is formed by joining the periphery of a flat aperture grill plate (10), formed by a thin metal sheet provided with a plurality of slits (11), to a frame. Extra slits (12a) having a width smaller than that of the plurality of slits (11) and capable of screening are formed in the flat aperture grill plate (10) respectively at positions outside end slits (11a) of the plurality of slits (11), at opposite ends of the effective area of the picture to secure uniformity in the width of the end slits (11a). <IMAGE>
Patent GB-2267182-A (GB)
Title: Overhead optical transmission system
Inventor: ROWLAND SIMON MARK
IPC: G02B6/48
Filed: 1993-05-07
Abstract: A method of installing an optical cable in an overhead power transmission line which comprises supporting an optical cable (1), which has an overall protective sheath of electrically insulating material, in long lengths between towers employed to support at least one electric power transmission line (2, Fig. 1) which is on load and, after the optical cable (1) has been so installed and while the overhead electric power transmission line is on load, providing on or in the supported optical cable at least one conductive path (11) which extends throughout substantially the whole length of the supported optical cable to carry along the cable (1) any currents that may be capacitively induced. The method enables a cable that will not be subject to dry-band arcing to be installed without danger to personnel during installation. In another embodiment, figure 6, a hollow tube (24) is provided within a jacket (23) enclosing a bundle of optic fibres (22) and a metallic wire (25) within the tube. The wire is capacitively coupled to the towers via the cable clamps. <IMAGE>
Patent GB-2269642-A (GB)
Title: Automatic transmission control system
Inventor: LEONARD ALLAN S
IPC: F16H61/02
Filed: 1993-08-06
Abstract: An electronically controlled valve ratio transmission for an automotive vehicle power train having a hydrokinetic torque converter with a bypass clutch, solenoid operated shift valves under the control of an electronic microprocessor that receives signals from an output shaft speed sensor, an engine speed sensor, a driver controlled drive range selector position, an engine throttle position sensor, and other powertrain operating variables. There are only two solenoid valves controlling four ratios via pilot-operated shift valves. Two shift valves (1-3 and 2-3) are in a common bore for operation together. The bypass clutch has a controlled slip. <IMAGE>
Patent GB-2271330-A (GB)
Title: Devices for lifting vehicles
Inventor: AMORINO ANGELO
IPC: B60S9/12
Filed: 1993-10-12
Abstract: A vehicle lifting device comprises a hydraulic jack 2 or the like built in the vehicle on each side thereof. The jacks are fed by a hydraulic power unit 3 operated by a motor 4 connected to the vehicle battery and controlled by means of a removable remote control device. The device can be used both to lift the vehicle in case of repairs, replacement of tyres etc., and as anti-theft devices, by simply lowering and locking it in the extended position when the vehicle is parked. <IMAGE>
Patent GB-2272298-A (GB)
Title: Device for detecting the presence of fuel in an oil tank of a turbojet engine.
Inventor: LECHEVALIER MICHEL MARIE ANDRE
IPC: F01M11/10
Filed: 1993-11-02
Abstract: A device for detecting fuel vapour in the atmosphere (3) of an oil tank (1) of a turbojet engine comprises an enclosure (11) disposed in the atmosphere (3) of the oil tank (1) and having an inner cavity (12) in communication with the said atmosphere (3) by means of holes (13) provided in the wall (14) of the enclosure (11), a piston (15) movably mounted inside the enclosure (11) and dividing the cavity (12) into a first chamber (16) and a second chamber (18), the piston (15) being capable of actuating means (21) for setting off an alarm (22) e.g. in an aircraft cockpit, and a cartridge (19) which fills the second chamber (18) and is capable of increasing in volume under the action of heat, the said cartridge (19) including at least one compound which, in the presence of fuel, brings about an exothermic reaction. The compound is a silicone based elastomer. In a second embodiment (Fig. 2) the cartridge comprises a second material (27) of high expansion coefficient, such as a wax, separated from the elastomer (26) by a copper or aluminium disc (28). <IMAGE>
Patent GB-2272156-A (GB)
Title: Water-soluble veterinary composition comprising sulfachlorpyridazine and trimethoprim
Inventor: KROSZTIAN MARIA
IPC: A61K9/00
Filed: 1993-11-03
Abstract: A stable, solid, water-soluble veterinary composition, wherein the active substance consists of the sodium salt of sulfachlorpyridazine and trimethoprim in a mass ratio of 5 to 1, and contains a mixture of (a) 1.6 to 3.3 per cent by mass of trimethoprim citrate applied to the surface of the particles of a water-soluble solid carrier, (b) 8.4 to 16.7 percent by mass of sulfachlorpyridazine-sodium and, optionally, (c) pharmaceutically acceptable additives consisting of poly(vinyl pyrrolidone) and/or silica.
Patent GB-2273805-A (GB)
Title: Method of correctly aligning the line width of outline font
Inventor: OTSUKA YOSHIRO
IPC: G06F17/21
Filed: 1992-06-03
Abstract: When an operation such as enlargement or scale-down to a designated character size is carried out for an outline font used in word processors, personal computers, printers, editing machines, computerized phototypographic machines, etc, the line widths of all characters are made equal, and crush of small characters is prevented to obtain clear printing. Fractions occurring in data positioned on transverse lines for line width adjustment when the outline font is enlarged or diminished are converted to positive numbers by the use of a calculation formula separately prepared, and the line widths are adjusted to an equal line width.
Patent GB-2273340-A (GB)
Title: Combined heat and power apparatus
Inventor: SUTTON JEFFREY ALAN
IPC: F22B7/12
Filed: 1993-12-09
Abstract: A boiler or steam boiler 2 comprises a furnace tube 10 having an entrance 32 which contains a gas burner 68 and also receives the hot exhaust gases from a small gas turbine 34 mounted on the boiler and giving an output, on a power take off shaft 58 from a power turbine 56, of 0.5 MW or less which drives an electrical power generator 60. Hot heating gases from the gas turbine 34 and/or the burner 68 pass directly along the furnace tube 10 and then through a first group of pass tubes 16 and finally through a second group of pass tubes 22 to an enclosure 26 comprising a flue 30. A driven fan 72 acts to draw the heating gases through the boiler and promotes a good flow of those gases.
Patent GB-2273146-A (GB)
Title: Improved rail launcher for airborne missiles
Inventor: GRAHAM THOMAS COLIER
IPC: F41F3/04
Filed: 1993-12-17
Abstract: A single fixed rail of a rail launcher for airborne missiles has a central longitudinal track in its underside and a pair of side tracks. Removable or relocatable rail track adaptors are fitted into both the central track and the pair of side tracks. <IMAGE>
Patent GB-2288247-A (GB)
Title: Beam sampling mirror having regular array of secondary reflecting surfaces
Inventor: WARD BROOKE ARMITAGE
IPC: G02B23/14
Filed: 1994-03-29
Abstract: A beam sampling device consisting of a mirror 21 having a regular array of identical depressions 24 in the surface 23. The bottoms 25 of the depressions form mirrors adapted to reflect a portion 27 of an incident beam of radiation 26 in a direction different to that in which the remainder of the incident beam is reflected by the mirror as a whole. The device is used to sample a laser beam. <IMAGE>
Patent GB-2276422-A (GB)
Title: Rotary screw-type machine
Inventor: YAMAMOTO AKIHIKO
IPC: F04C18/08
Filed: 1994-04-20
Abstract: A compressor or a vacuum pump has male and female rotors 1', 2' which rotate within a casing 3', with or without mutual contact. One of the male and female rotors is surface-treated to have a structure composed of a non-electrolytic Ni plating layer and the other rotor is treated to have a covering layer of organic resin. The organic resin may be one or more kinds selected from a group of engineering plastics, so as to improve mechanical strength. Also disclosed is a construction in which each rotor has a non-electrolytic Ni plating layer, this layer being covered by a layer of organic resin on one of the rotors. <IMAGE>